How many types of sets?
There are various kinds of sets like – finite and infinite sets, equal and equivalent sets, a null set.
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There are various types of sets:
(i) Finite set: A set having no elements or a definite number of elements is called a finite set.
Ex. V = The set of vowels of english alphabet = { a, e, i, o, u}
(ii) Infinite set: A set having unlimited number of elements is called an infinite set.
Ex. N = The set of natural numbers = { 1, 2, 3, 4 , ….}
(iii) Empty set: A set containing no element is called the empty or null or void set. The symbol for empty set is φ.
φ = { }
(iv) Singleton set: A set containing only one element is called a singleton set.
Ex. {2}, {a}, {0}
Note : { } is the empty set whereas {0} is a singleton set.